ref: 41e6ec4a5776016b9d9b635a4520229b7be3e83e
dir: /vp9/common/vp9_common_data.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp9/common/vp9_blockd.h"
#include "vp9/common/vp9_common_data.h"
// Log 2 conversion lookup tables for block width and height
const int b_width_log2_lookup[BLOCK_SIZES] =
{0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4};
const int b_height_log2_lookup[BLOCK_SIZES] =
{0, 1, 0, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4};
const int num_4x4_blocks_wide_lookup[BLOCK_SIZES] =
{1, 1, 2, 2, 2, 4, 4, 4, 8, 8, 8, 16, 16};
const int num_4x4_blocks_high_lookup[BLOCK_SIZES] =
{1, 2, 1, 2, 4, 2, 4, 8, 4, 8, 16, 8, 16};
// Log 2 conversion lookup tables for modeinfo width and height
const int mi_width_log2_lookup[BLOCK_SIZES] =
{0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3};
const int num_8x8_blocks_wide_lookup[BLOCK_SIZES] =
{1, 1, 1, 1, 1, 2, 2, 2, 4, 4, 4, 8, 8};
const int num_8x8_blocks_high_lookup[BLOCK_SIZES] =
{1, 1, 1, 1, 2, 1, 2, 4, 2, 4, 8, 4, 8};
// MIN(3, MIN(b_width_log2(bsize), b_height_log2(bsize)))
const int size_group_lookup[BLOCK_SIZES] =
{0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3};
const int num_pels_log2_lookup[BLOCK_SIZES] =
{4, 5, 5, 6, 7, 7, 8, 9, 9, 10, 11, 11, 12};
const PARTITION_TYPE partition_lookup[][BLOCK_SIZES] = {
{ // 4X4
// 4X4, 4X8,8X4,8X8,8X16,16X8,16X16,16X32,32X16,32X32,32X64,64X32,64X64
PARTITION_NONE, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID
}, { // 8X8
// 4X4, 4X8,8X4,8X8,8X16,16X8,16X16,16X32,32X16,32X32,32X64,64X32,64X64
PARTITION_SPLIT, PARTITION_VERT, PARTITION_HORZ, PARTITION_NONE,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID
}, { // 16X16
// 4X4, 4X8,8X4,8X8,8X16,16X8,16X16,16X32,32X16,32X32,32X64,64X32,64X64
PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT,
PARTITION_VERT, PARTITION_HORZ, PARTITION_NONE, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID
}, { // 32X32
// 4X4, 4X8,8X4,8X8,8X16,16X8,16X16,16X32,32X16,32X32,32X64,64X32,64X64
PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT,
PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_VERT,
PARTITION_HORZ, PARTITION_NONE, PARTITION_INVALID,
PARTITION_INVALID, PARTITION_INVALID
}, { // 64X64
// 4X4, 4X8,8X4,8X8,8X16,16X8,16X16,16X32,32X16,32X32,32X64,64X32,64X64
PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT,
PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_SPLIT,
PARTITION_SPLIT, PARTITION_SPLIT, PARTITION_VERT, PARTITION_HORZ,
PARTITION_NONE
}
};
const BLOCK_SIZE subsize_lookup[PARTITION_TYPES][BLOCK_SIZES] = {
{ // PARTITION_NONE
BLOCK_4X4, BLOCK_4X8, BLOCK_8X4,
BLOCK_8X8, BLOCK_8X16, BLOCK_16X8,
BLOCK_16X16, BLOCK_16X32, BLOCK_32X16,
BLOCK_32X32, BLOCK_32X64, BLOCK_64X32,
BLOCK_64X64,
}, { // PARTITION_HORZ
BLOCK_INVALID, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_8X4, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_16X8, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_32X16, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_64X32,
}, { // PARTITION_VERT
BLOCK_INVALID, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_4X8, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_8X16, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_16X32, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_32X64,
}, { // PARTITION_SPLIT
BLOCK_INVALID, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_4X4, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_8X8, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_16X16, BLOCK_INVALID, BLOCK_INVALID,
BLOCK_32X32,
}
};
const TX_SIZE max_txsize_lookup[BLOCK_SIZES] = {
TX_4X4, TX_4X4, TX_4X4,
TX_8X8, TX_8X8, TX_8X8,
TX_16X16, TX_16X16, TX_16X16,
TX_32X32, TX_32X32, TX_32X32, TX_32X32
};
const BLOCK_SIZE txsize_to_bsize[TX_SIZES] = {
BLOCK_4X4, // TX_4X4
BLOCK_8X8, // TX_8X8
BLOCK_16X16, // TX_16X16
BLOCK_32X32, // TX_32X32
};
const TX_SIZE tx_mode_to_biggest_tx_size[TX_MODES] = {
TX_4X4, // ONLY_4X4
TX_8X8, // ALLOW_8X8
TX_16X16, // ALLOW_16X16
TX_32X32, // ALLOW_32X32
TX_32X32, // TX_MODE_SELECT
};
const BLOCK_SIZE ss_size_lookup[BLOCK_SIZES][2][2] = {
// ss_x == 0 ss_x == 0 ss_x == 1 ss_x == 1
// ss_y == 0 ss_y == 1 ss_y == 0 ss_y == 1
{{BLOCK_4X4, BLOCK_INVALID}, {BLOCK_INVALID, BLOCK_INVALID}},
{{BLOCK_4X8, BLOCK_4X4}, {BLOCK_INVALID, BLOCK_INVALID}},
{{BLOCK_8X4, BLOCK_INVALID}, {BLOCK_4X4, BLOCK_INVALID}},
{{BLOCK_8X8, BLOCK_8X4}, {BLOCK_4X8, BLOCK_4X4}},
{{BLOCK_8X16, BLOCK_8X8}, {BLOCK_INVALID, BLOCK_4X8}},
{{BLOCK_16X8, BLOCK_INVALID}, {BLOCK_8X8, BLOCK_8X4}},
{{BLOCK_16X16, BLOCK_16X8}, {BLOCK_8X16, BLOCK_8X8}},
{{BLOCK_16X32, BLOCK_16X16}, {BLOCK_INVALID, BLOCK_8X16}},
{{BLOCK_32X16, BLOCK_INVALID}, {BLOCK_16X16, BLOCK_16X8}},
{{BLOCK_32X32, BLOCK_32X16}, {BLOCK_16X32, BLOCK_16X16}},
{{BLOCK_32X64, BLOCK_32X32}, {BLOCK_INVALID, BLOCK_16X32}},
{{BLOCK_64X32, BLOCK_INVALID}, {BLOCK_32X32, BLOCK_32X16}},
{{BLOCK_64X64, BLOCK_64X32}, {BLOCK_32X64, BLOCK_32X32}},
};
// Generates 4 bit field in which each bit set to 1 represents
// a blocksize partition 1111 means we split 64x64, 32x32, 16x16
// and 8x8. 1000 means we just split the 64x64 to 32x32
const struct {
PARTITION_CONTEXT above;
PARTITION_CONTEXT left;
} partition_context_lookup[BLOCK_SIZES]= {
{15, 15}, // 4X4 - {0b1111, 0b1111}
{15, 14}, // 4X8 - {0b1111, 0b1110}
{14, 15}, // 8X4 - {0b1110, 0b1111}
{14, 14}, // 8X8 - {0b1110, 0b1110}
{14, 12}, // 8X16 - {0b1110, 0b1100}
{12, 14}, // 16X8 - {0b1100, 0b1110}
{12, 12}, // 16X16 - {0b1100, 0b1100}
{12, 8 }, // 16X32 - {0b1100, 0b1000}
{8, 12}, // 32X16 - {0b1000, 0b1100}
{8, 8 }, // 32X32 - {0b1000, 0b1000}
{8, 0 }, // 32X64 - {0b1000, 0b0000}
{0, 8 }, // 64X32 - {0b0000, 0b1000}
{0, 0 }, // 64X64 - {0b0000, 0b0000}
};